Spherical stabilizer for well drilling
By designing a spherical stabilizer for drilling that can be detachable and disassembled, the problem of high maintenance costs when replacing the stabilizer in the prior art is solved, and the spherical helix is independent replacement and wellbore expansion are achieved, which reduces the risk of obstacles and stucks during the drilling process and improves drilling efficiency.
Patent Information
- Application Number
- CN202421800436.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-29
AI Technical Summary
Existing spherical stabilizers for drilling are generally integrated and fixed on the body. When replacing, they need to be replaced in one piece, resulting in high maintenance costs.
A detachable and split type spherical stabilizer for drilling is designed. By integrating a connecting sleeve in the middle of the outer side of the body, the front end of the connecting sleeve is fixed to the snap ring, and the tail end of the snap ring is snapped to connect the spherical helix. The tail end of the spherical helix is fixed by a limit ring. The front end of the spherical helix is embedded in the rolling connection of the ball, and a cutting edge is set on the rear side of the ball.
The independent disassembly and replacement of spherical helix is achieved, which reduces maintenance costs. Through the design of spherical helix and the use of cutting edges, the drilling string encounters obstacles and stucks caused by the reduction of the wellbore, and improves drilling efficiency.
Smart Images
Figure CN222810761U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil mining drilling tools, in particular to a spherical stabilizer for drilling. Background Art
[0002] The stabilizer is a thick-diameter joint with fins (straight or spiral). During the drilling process, when the drill string rotates at high speed in the wellbore, the stabilizer can reduce the violent radial and axial vibrations of the drill string elastic system in the hole, keep the slender drill pipe running smoothly, and make the drill bit axis rotate as close to the center line of the borehole as possible. At the same time, it can reduce the eccentric wear of the drill bit and drill pipe and prevent well deviation.
[0003] In actual drilling operations, due to the effects of formation inclination and formation pressure, the wellbore is very likely to shrink, which will cause the drilling tool to encounter obstructions and jams. In severe cases, the drill may be buried or even a large section of the wellbore may be scrapped. Therefore, it is necessary to add a stabilizer to the rear side of the drill bit to cut the well wall and expand the wellbore. After long-term cutting, the stabilizer will wear out and need to be replaced. The existing spherical stabilizers for drilling are generally integrated and fixed on the main body. When replacing, they need to be connected to the main body for replacement, which has high maintenance costs. Utility Model Content
[0004] The utility model aims to provide a spherical stabilizer for drilling, so as to solve the problem that the existing spherical stabilizers for drilling are generally integrated and fixed on a body, and when replaced, they need to be connected to the body for replacement, resulting in high maintenance costs.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A spherical stabilizer for drilling comprises a main body, a connecting sleeve is integrated in the middle of the outer side of the main body, the front end of the connecting sleeve is fixedly connected with a clamping ring, the tail end of the clamping ring is snap-connected with a spherical spiral wing, the spherical spiral wing is sleeved on the connecting sleeve, and the tail end is fixed by a limiting ring, the limiting ring is threadedly connected to the tail end of the connecting sleeve, the front end of the spherical spiral wing is embedded in a rolling connection with a ball, the rear side of the ball is provided with a cutting edge, and the cutting edge is embedded in the rotor center of the spherical spiral wing.
[0007] Preferably, the main body is a cylinder with an inner through hole, and an internal thread buckle is integrated at the tail end, and an external threaded thread connector is integrated at the front end.
[0008] Preferably, the spherical spiral wing is formed by cutting spiral grooves around an alloy ball.
[0009] Preferably, the ball and the cutting edge are both made of cemented carbide.
[0010] Preferably, the front side of the surface of the connecting sleeve is equidistantly fixedly connected with connecting keys, and the inner front side of the spherical spiral wing and the position corresponding to the connecting key are provided with key slots, and the key slots and the connecting keys are in transition fit.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] 1. In the present invention, the annular spiral wing and the main body are designed to be detachable and split, so that the annular spiral wing can be independently disassembled, replaced and repaired when it is worn or damaged after long-term use, thereby avoiding replacement together with the main body to reduce maintenance costs.
[0013] 2. In the utility model, by adding a spherical spiral wing to the main body, and adding a ball and a cutting edge to the front end and the center of the spherical spiral wing respectively, the cutting edge can be used to cut and expand the hole on the well wall after deep drilling by the drill bit, and the spherical design combined with the spiral grooves around can realize the drilling upflow reflux, and adding a ball at the front end of the spherical spiral wing can prevent the drill cuttings from getting stuck in the spherical spiral wing, thereby avoiding the occurrence of obstruction and jamming of the drill string caused by the shrinkage of the wellbore, thereby ensuring the drilling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a front axle view of a spherical stabilizer for drilling according to the utility model;
[0015] Figure 2 This is a rear axle view of a spherical stabilizer for drilling according to the utility model;
[0016] Figure 3 This is a structural explosion diagram of a spherical stabilizer for drilling according to the utility model;
[0017] Figure 4 The utility model is a side sectional view of a clamping ring structure of a spherical stabilizer for drilling.
[0018] In the figure: 1, body; 11, internal thread buckle; 12, external thread thread connector; 2, connecting sleeve; 3, retaining ring; 4, spherical spiral wing; 41, spiral groove; 5, limit ring; 6, ball; 7, cutting edge; 8, connecting key; 9, keyway. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0020] See also Figure 1-4 , the utility model provides a technical solution:
[0021] A spherical stabilizer for drilling comprises a main body 1, a connecting sleeve 2 is integrated in the middle part of the outer side of the main body 1, a clamping ring 3 is fixedly connected to the front end of the connecting sleeve 2, a spherical spiral wing 4 is buckled and connected to the tail end of the clamping ring 3, the spherical spiral wing 4 is sleeved on the connecting sleeve 2, and the tail end is fixed by a limiting ring 5, the limiting ring 5 is threadedly connected to the tail end of the connecting sleeve 2, and the spherical spiral wing clamped in the clamping ring is limited and fixed by the threaded limiting ring, so that the spherical spiral wing can be disassembled and replaced independently after being worn or damaged, so as to reduce the maintenance cost; the front end of the spherical spiral wing 4 is embedded with a ball 6 in a rolling connection, which is used for the front end of the spherical spiral wing to rotate when encountering resistance, so as to realize the deflection of drill cuttings and prevent the stabilizer from being stuck in the process of drill cuttings returning with the drilling fluid; the rear side of the ball 6 is provided with a cutting edge 7, which is embedded in the center of the rotor of the spherical spiral wing 4, so as to realize cutting and expanding the hole of the well wall after the drill bit is deep drilled, so as to avoid the situation that the drill string encounters resistance and gets stuck due to the shrinkage of the wellbore, and ensure the drilling efficiency.
[0022] In this embodiment, see Figure 2 The main body 1 is a cylindrical body with an inner through hole, and an internal threaded buckle 11 is integrated at the rear end, and an external threaded threaded connector 12 is integrated at the front end, which is used for threaded connection and fixing of both ends of the stabilizer so that the stabilizer can be installed between the drill bit and the drill string.
[0023] In this embodiment, see Figure 1 The spherical spiral wing 4 is formed by cutting a spiral groove 41 around the alloy ball, so that the spiral groove is formed around the spherical spiral wing, which is convenient for the drilling fluid to carry the drill cuttings backflow and rise. The spiral groove design can drive the drilling centripetal rotation and rise along with the rotation of the drill bit, which can accelerate the return of the drilling fluid and reduce the sticking of the drill cuttings to the wall, thereby ensuring the return efficiency of the drilling carrying the drill cuttings.
[0024] In this embodiment, the ball 6 and the cutting edge 7 are both made of hard alloy, which ensures the structural strength and wear resistance of the cutting edge and the ball.
[0025] In this embodiment, see Figure 3 The front side of the surface of the connecting sleeve 2 is equidistantly fixed with connecting keys 8, and the inner front side of the spherical spiral wing 4 and the position corresponding to the connecting key 8 are provided with key grooves 9. The key grooves 9 and the connecting keys 8 are transitionally matched to achieve axially stable fixation of the spherical spiral wing and the main body, prevent side slip, and ensure structural stability.
[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".
[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A spherical stabilizer for drilling, comprising a body (1), characterized in that: A connecting sleeve (2) is integrated in the middle of the outer side of the body (1); a front end of the connecting sleeve (2) is fixedly connected to a clamping ring (3); a rear end of the clamping ring (3) is snap-connected to a spherical spiral wing (4); the spherical spiral wing (4) is sleeved on the connecting sleeve (2), and the rear end is fixed by a limiting ring (5); the limiting ring (5) is threadedly connected to the rear end of the connecting sleeve (2); a ball (6) is embedded in the front end of the spherical spiral wing (4) in a rolling connection; a cutting edge (7) is provided on the rear side of the ball (6); and the cutting edge (7) is embedded in the center of the rotor of the spherical spiral wing (4).
2. A spherical stabilizer for drilling according to claim 1, characterized in that: The body (1) is a cylindrical body with an inner through hole, and an internal thread buckle (11) is integrated at the rear end, and an external threaded thread connector (12) is integrated at the front end.
3. A spherical stabilizer for drilling according to claim 1, characterized in that: The spherical spiral wing (4) is formed by cutting spiral grooves (41) around an alloy ball.
4. A spherical stabilizer for drilling according to claim 1, characterized in that: The ball (6) and the cutting edge (7) are both made of hard alloy.
5. A spherical stabilizer for drilling according to claim 1, characterized in that: The front side of the surface of the connecting sleeve (2) is equidistantly fixedly connected with a connecting key (8), and the inner front side of the spherical spiral wing (4) and the position corresponding to the connecting key (8) are provided with a key groove (9), and the key groove (9) and the connecting key (8) are in transition fit.